**Exhibit 31.1**

**CERTIFICATION PURSUANT TO**

**RULES 13a-14(a) and 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,**

**AS AMENDED**

I,Dr. Avishay S. Katz, certify that: 

1. I have reviewed this report on Form 10-Q of GigOptix, Inc. (the “registrant”)for the three months ended October 3, 2010. 

2. Based on my knowledge, this report does not contain any untrue statement of a materialfact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. 

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects thefinancial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report. 

4. Theregistrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (asdefined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have: 

*a)*Designed such disclosurecontrols and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant is made known to us by others within those entities, particularly duringthe period in which this report is being prepared; 

*b)* Designed such internal control over financial reporting, orcaused such internal controls over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposed inaccordance with generally accepted accounting principles; 

*c)* Evaluated the effectiveness of the registrant’sdisclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and 

*d)* Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during theregistrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting. 

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the auditcommittee of registrant’s board of directors: 

*a)* All significant deficiencies and material weaknesses in thedesign or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and 

*b) A*ny fraud, whether or not material, that involves management or other employees who have a significant role in theregistrant’s internal control over financial reporting. 

Date: November 17, 2010